Bavarian police spokesman Stefan Gaisbauer said there were no indications anyone other than those found dead were involved, but that it is not yet clear what happened.

"We assume that no other people were involved in the deaths of the three," he said.

Autopsy results were expected on Tuesday.

The dead, a 53-year-old man and two women aged 33 and 30, were all German citizens.

The man and the elder of the two women are from the village of Berod in south-western Germany, while the younger woman was last registered as living in Wittingen at the flat in which the bodies of the two other women were discovered.